\(x^2\left(2x-y\right)+y-2x=x^2\left(2x-y\right)-\left(2x-y\right)=\left(x^2-1\right)\left(2x-y\right)\)
\(=\left(x-1\right)\left(x+1\right)\left(2x-y\right)\)
\(x^2-36+y^2-2xy=\left(x^2-2xy+y^2\right)-36=\left(x-y\right)^2-6^2\)
\(=\left(x-y-6\right)\left(x-y+6\right)\)
\(4x^2-8x+4=4\left(x^2-2x+1\right)=4\left(x-1\right)^2\)
\(x^3+2x^2y+xy^2-4\) đa thức này không phân tích được
\(2x^2\left(1-x\right)-4\left(x-1\right)=2x^2\left(1-x\right)+4\left(1-x\right)=2\left(x^2+2\right)\left(1-x\right)\)
\(x-y-x^2+2xy-y^2=x-y-\left(x-y\right)^2=\left(x-y\right)\left(1-x+y\right)\)